I-modulator ye-Acousto-optic: Ukusetshenziswa kumakhabethe e-athomu abandayo

I-modulator ye-Acousto-optic: Ukusetshenziswa kumakhabethe e-athomu abandayo

Njengengxenye eyinhloko yesixhumanisi se-laser esine-fiber yonke kukhabhinethi ye-athomu ebandayo,i-modulator ye-acousto-optic yefayibha yokukhanyaizohlinzeka nge-laser enamandla amakhulu okuzinza kwemvamisa yekhabhinethi ye-athomu ebandayo. Ama-athomu azomunca ama-photon ngemvamisa ezwakalayo engu-v1. Njengoba umfutho wama-photon nama-athomu uphambene, ijubane lama-athomu lizoncipha ngemva kokumunca ama-photon, ngaleyo ndlela kufezwe injongo yokupholisa ama-athomu. Ama-athomu apholile nge-laser, ngezinzuzo zawo ezifana nesikhathi eside sokuhlola, ukususwa kokushintsha kwemvamisa ye-Doppler kanye nokushintsha kwemvamisa okubangelwa ukushayisana, kanye nokuhlangana okubuthakathaka kwensimu yokukhanya kokuthola, kuthuthukisa kakhulu ikhono lokulinganisa elinembile lama-spectra e-athomu futhi kungasetshenziswa kabanzi kumawashi e-athomu abandayo, ama-interferometer e-athomu abandayo, kanye nokuzulazula kwe-athomu ebandayo, phakathi kwezinye izinkambu.

Ingaphakathi le-modulator ye-AOM acousto-optic fiber optical ikakhulukazi lakhiwe yi-acousto-optic crystal kanye ne-optical fiber collimator, njll. Isignali eguquliwe isebenza ku-piezoelectric transducer ngesimo sesignali kagesi (ukuguqulwa kwe-amplitude, ukuguqulwa kwesigaba noma ukuguqulwa kwemvamisa). Ngokushintsha izici zokufaka ezifana nemvamisa kanye ne-amplitude yesignali eguquliwe yokufaka, ukuguqulwa kwemvamisa kanye ne-amplitude ye-laser yokufaka kufinyelelwa. I-piezoelectric transducer iguqula izimpawu zikagesi zibe izimpawu ze-ultrasonic ezihluka ngendlela efanayo ngenxa yomphumela we-piezoelectric futhi izisakaze ku-acousto-optic medium. Ngemva kokuba inkomba yokukhanya kwe-acousto-optic medium ishintsha njalo, kwakheka i-refractive index grating. Lapho i-laser idlula ku-fiber collimator futhi ingena ku-acousto-optic medium, kwenzeka i-diffraction. Imvamisa yokukhanya okuguquliwe ibeka imvamisa ye-ultrasonic ku-input laser frequency yokuqala. Lungisa indawo ye-optical fiber collimator ukuze i-optical fiber acoust-optic modulator isebenze esimweni esihle kakhulu. Ngalesi sikhathi, i-engela yesigameko sokukhanya kwesibani sesigameko kufanele ihlangabezane nesimo se-Bragg diffraction, futhi imodi ye-diffraction kufanele ibe yi-Bragg diffraction. Ngalesi sikhathi, cishe wonke amandla okukhanya kwesibani sesigameko adluliselwa ekukhanyeni kwe-diffraction ye-oda lokuqala.

I-modulator yokuqala ye-AOM acouto-optic isetshenziswa engxenyeni engaphambili ye-amplifier yesistimu, ilawula ukukhanya okuqhubekayo kokufaka kusukela engxenyeni engaphambili ngama-pulse e-optical. Ama-pulse e-optical aguquliwe abe esengena kwi-module ye-optical amplification yesistimu ukuze kukhuliswe amandla. EyesibiliI-modulator ye-acouto-optic ye-AOMisetshenziswa ekugcineni kwe-optical amplifier, futhi umsebenzi wayo ukuhlukanisa umsindo oyisisekelo wesignali ye-optical pulse ekhuliswa uhlelo. Amaphethelo angaphambili nangemuva okukhishwa kwama-light pulses yi-AOM acouto-optic modulator yokuqala asatshalaliswa ngokulinganayo. Ngemva kokungena kwi-optical amplifier, ngenxa yokuthi i-gain ye-amplifier yomphetho ohamba phambili we-pulse iphakeme kunaleyo yomphetho ohamba phambili we-pulse, ama-amplified light pulses azobonisa isenzakalo sokuphambuka kwesimo samagagasi lapho amandla egxile emphetho ohamba phambili, njengoba kuboniswe kuMfanekiso 3. Ukuze uhlelo lukwazi ukuthola ama-optical pulses anokusatshalaliswa okufanayo emaphethelweni angaphambili nangemuva, i-AOM acouto-optic modulator yokuqala idinga ukusebenzisa i-analog modulation. Iyunithi yokulawula uhlelo ilungisa umphetho ophakamayo we-AOM acouto-optic modulator yokuqala ukuze ikhulise umphetho ophakamayo we-optical pulse ye-acoust-optic module futhi ibuyisele ukungalingani kwe-gain ye-amplifier ye-optical emaphethelweni angaphambili nangemuva e-pulse.

I-amplifier yokukhanya yesistimu ayigcini nje ngokukhulisa izimpawu zokushaya kwenhliziyo eziwusizo, kodwa futhi ikhulisa umsindo oyisisekelo wochungechunge lokushaya kwenhliziyo. Ukuze kufezwe isilinganiso sesignali-kuya-kumsindo sesistimu ephezulu, isici sesilinganiso sokuphela esiphezulu se-fiber yokukhanyaI-modulator ye-AOMisetshenziselwa ukucindezela umsindo wesisekelo ekugcineni kwangemuva kwe-amplifier, ukuqinisekisa ukuthi ama-pulse esignali yesistimu angadlula ngempumelelo ngezinga elikhulu ngenkathi ivimbela umsindo wesisekelo ukuthi ungangeni ku-acousto-optic shutter ye-time-domain (isango le-pulse le-time-domain). Indlela yokuguqulwa kwedijithali iyasetshenziswa, futhi isignali yezinga le-TTL isetshenziselwa ukulawula ukuvula nokuvala i-module ye-acoust-optic ukuqinisekisa ukuthi umkhawulo okhuphukayo we-pulse ye-time-domain ye-module ye-acoust-optic yisikhathi esiklanyelwe sokukhuphuka somkhiqizo (okungukuthi, isikhathi esincane sokukhuphuka umkhiqizo ongasithola), kanye nobubanzi be-pulse buncike kububanzi be-pulse yesignali yezinga le-TTL yesistimu.